Across
- 1. form salts with metals
- 6. number of protons in a atom
- 7. the amount of energy needed to remove an electrons from an atom
- 9. elements that have 8 valence electrons
- 11. electrons in the outer energy level
- 13. number of protons and neutrons in a atom
Down
- 2. tells how many electrons an ion could have
- 3. the ability of an atom to attract shared electrons
- 4. most reactive metal group
- 5. tells us the fixed amount of energy an atom can have
- 8. elements between groups 3 and 12
- 10. an elements ability to gain, lose, or share electrons
- 12. half the diameter of an atom